From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758380AbdAES61 (ORCPT ); Thu, 5 Jan 2017 13:58:27 -0500 Received: from mga07.intel.com ([134.134.136.100]:46589 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754031AbdAES6B (ORCPT ); Thu, 5 Jan 2017 13:58:01 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,322,1477983600"; d="scan'208";a="1079624266" Subject: Re: [RFC] x86/mm/KASLR: Remap GDTs at fixed location To: Thomas Garnier , Andy Lutomirski References: <20170104221630.831-1-thgarnie@google.com> Cc: Thomas Gleixner , Ingo Molnar , "H . Peter Anvin" , Kees Cook , Borislav Petkov , Andy Lutomirski , Dave Hansen , Chen Yucong , Paul Gortmaker , Andrew Morton , Masahiro Yamada , Sebastian Andrzej Siewior , Anna-Maria Gleixner , Boris Ostrovsky , Rasmus Villemoes , Michael Ellerman , Juergen Gross , Richard Weinberger , X86 ML , "linux-kernel@vger.kernel.org" , "kernel-hardening@lists.openwall.com" From: Arjan van de Ven Message-ID: Date: Thu, 5 Jan 2017 10:58:00 -0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Thunderbird/45.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/5/2017 9:54 AM, Thomas Garnier wrote: > > That's my goal too. I started by doing a RO remap and got couple > problems with hibernation. I can try again for the next iteration or > delay it for another patch. I also need to look at KVM GDT usage, I am > not familiar with it yet. don't we write to the GDT as part of the TLS segment stuff for glibc ?